#include <stdio.h>
int getsum(int a,int b)
{
    printf("修改\n");
    return a+b;
}
int getsub(int a,int b)
{
    printf("sub\n");
    return a-b;
}
int main(int argc, char const *argv[])
{
    printf("Hello world\n");
    printf("%d\n",getsum(1,2));
    printf("第三次提交\n");
    return 0;
}
